P89LPC9321 查看數據表（PDF） - NXP Semiconductors.

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P89LPC9321

8-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable flash with 512-byte data EEPROM

NXP Semiconductors. 

NXP Semiconductors

P89LPC9321

8-bit microcontroller with accelerated two-clock 80C51 core

7. Functional description

Remark: Please refer to the P89LPC9321 User manual for a more detailed functional

description.

7.1 Special function registers

Remark: SFR accesses are restricted in the following ways:

• User must not attempt to access any SFR locations not defined.

• Accesses to any defined SFR locations must be strictly for the functions for the SFRs.

• SFR bits labeled ‘-’, ‘0’ or ‘1’ can only be written and read as follows:

– ‘-’ Unless otherwise specified, must be written with ‘0’, but can return any value

when read (even if it was written with ‘0’). It is a reserved bit and may be used in

future derivatives.

– ‘0’ must be written with ‘0’, and will return a ‘0’ when read.

– ‘1’ must be written with ‘1’, and will return a ‘1’ when read.

P89LPC9321_1

Product data sheet

Rev. 01 — 9 December 2008

© NXP B.V. 2008. All rights reserved.

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